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RECORD NUMBER: 8 OF 10

OLS Field Name OLS Field Data
Main Title Sorption of Heavy Metals by the Soil Fungi 'Aspergillus niger' and Mucor rouxii.
Author Mullen, M. D. ; Wolf, D. C. ; Beveridge, T. J. ; Bailey., G. W. ;
CORP Author Environmental Research Lab., Athens, GA. ;Tennessee Univ. at Martin. ;Arkansas Univ., Fayetteville. Dept. of Agronomy. ;Guelph Univ. (Ontario). Dept. of Microbiology.
Publisher c1992
Year Published 1992
Report Number EPA/600/J-92/155;
Stock Number PB92-179811
Additional Subjects Heavy metals ; Sorption ; Soil microorganisms ; Land pollution ; Fungi ; Cells(Biology) ; Immobilization ; Biomass ; Electron microscopy ; Microbiology ; Silver ; Lanthanum ; Inorganic salt ; X ray analysis ; Chemical bonds ; Colloids ; Isotherms ; Cadmium ; Copper ; Reprints ; Aspergillus niger ; Mucor rouxii
Holdings
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Status
NTIS  PB92-179811 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 08/22/1992
Collation 9p
Abstract
Sorption of the nitrate salts of cadmium(II), copper(II), lanthanum(III) and silver(I) by two fungi, Aspergillus niger and Mucor rouxii, was evaluated using Freundlich adsorption isotherms and energy dispersive X-ray electron microscopy. The linearized Freundlich isotherm described the metal sorption data well for metal concentrations of 5 microM-1 mM metal. Differences in metal binding were observed among metals, as well as between fungal species. Calculated Freundlich K values indicated that metal binding decreased in the order La(3+) > or = Ag(+) > Cu(2+) > Cd(2+). However, sorption of Ag(+) was greater than that of La(3+) from solutions of 0.1 and 1 mM metal and likely due to precipitation at the cell wall surface. At the 1 mM initial concentration, there were no significant differences between the two fungi in metal sorption, except for Ag(+) binding. At the 5 microM concentration, there was no difference between the fungi in their sorption capacities for the four metals. Electron microscopy-energy dispersive X-ray analysis indicated that silver precipitated onto cells as colloidal silver. The results indicate that Freundlich isotherms may be useful for describing short-term metal sorption by fungal biomass and for comparison with other soil constituents in standardized systems. (Copyright (c) 1992 Pergamon Press plc.)